on topics including the economy, immigration, and foreign policy. but another big focus -- gun violence. and some of the faces in the crowd reflected that fact. the union addresses. the of congress. but seated in the hall. prominent guests who are victims of gun violence. obama. the parents of slain >> "just three weeks ago, she was here, in washington, with her classmates, performing for her country at my inauguration. and a week later, she was shot and killed in a chicago park after school." >>catherine: the president also talked about the tragic shootings in newtown, connecticut. >> "it has been two months since newtown. i know this is not the first time this country has debated how to reduce gun violence, but this time is different." >>catherine: it was after these shootings that the president proposed toughening gun laws. >> "these proposals deserve a vote. because in the two months since newtown, more than a thousand birthdays, graduations, and anniversaries have been stolen from our lives by a bullet from a gun." >>catherine: president obama made an emotional appeal to congress.